CN203731904U

CN203731904U - Intermediate heat exchanger

Info

Publication number: CN203731904U
Application number: CN201420040915.0U
Authority: CN
Inventors: 刘明军; 郑国强; 仝先峰
Original assignee: LUOYANG ZHONGGUANG PETROCHEMICAL MACHINERY & EQUIPMENT Co Ltd
Current assignee: LUOYANG ZHONGGUANG PETROCHEMICAL MACHINERY & EQUIPMENT Co Ltd
Priority date: 2014-01-23
Filing date: 2014-01-23
Publication date: 2014-07-23
Anticipated expiration: 2024-01-23

Abstract

The utility model relates to the technical field of heat exchangers for the chemical industry, and discloses an intermediate heat exchanger which comprises a left tube box, a shell, a right tube box, an outer head cover and a sealing head. The left tube box and the right tube box are integrally connected through the shell, the outer head cover is arranged outside the outer tube box, the sealing head is arranged at one end of the outer head cover, a mixed gas inlet is formed in one side of the outer head cover, a reaction gas inlet and a pressure gage opening are formed in the head of one end of the left tube box, and the other end of the left tube box is connected with the shell through an octangle mat in a sealing mode. A plurality of tube bundles are arranged in the shell, an exhaust opening is formed in the wall of the shell located at the input ends of the tube bundles, and a mixed gas outlet is formed in the wall of the shell located at the middle ends of the tube bundles. By means of the intermediate heat exchanger, the defect that heat exchanging tubes are lengthened due to the fact that temperature difference stress is generated by the heat exchanging tubes under high temperature and high pressure is overcome, and the problem that existing equipment can not absorb displacement, caused by temperature difference stress, of the heat exchanging tubes, and the equipment is damaged is well solved.

Description

Intermediate Heat Exchanger

Technical field

The utility model relates to chemical industry technical field of heat exchangers, relates in particular to a kind of Intermediate Heat Exchanger of chemical industry.

Background technology

At present, the widely used heat exchanger structure form of chemical industry mainly contains movable tube sheets heat exchanger and fixed tube-sheet exchanger, and existing movable tube sheets heat exchanger pluses and minuses are as follows:

Advantage: (1) tube bank can be extracted out, to facilitate scavenge pipe, shell side; (2) between medium, the temperature difference is unrestricted; (3) can under high temperature, high pressure, work, general temperature is less than or equal to 450 degree, and pressure is less than or equal to 6.4 MPas; (4) can be used for the more serious occasion of fouling; (5) can be used for the perishable occasion of tube side.Shortcoming: (1) little floating head leaks in easily occurring; (2) metal material consumption is large, and cost is high by 20%; (3) complex structure.

Described fixed tube-sheet exchanger pluses and minuses are as follows:

Advantage: simple in structure, easily manufactured, its housing internal diameter minimum in identical tube bank situation, tube side divides journey more convenient.

Shortcoming: shell side cannot carry out mechanical cleaning, shell side checks difficulty, between housing and pipe, can produce larger thermal (temperature difference) stress during without temperature difference compensation element, need adopt the compensating element, such as expansion joint or bellows to reduce thermal (temperature difference) stress when the temperature difference is larger.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a kind of Intermediate Heat Exchanger.Can overcome the elongation that under HTHP heat exchanger tube can produce thermal (temperature difference) stress and cause heat exchanger tube, solve well existing equipment and can not absorb the problem that this part heat exchanger tube displacement being caused by thermal (temperature difference) stress causes device damage.

In order to realize foregoing invention object, the utility model adopts technical scheme as follows:

A kind of Intermediate Heat Exchanger, comprise: left pipe box 3, housing 14, right pipe box 12, outer skull 8, end socket 9, described left pipe box 3 links into an integrated entity by housing 14 and right pipe box 12, right pipe box 12 is outside equipped with outer skull 8, outer skull 8 one end are provided with end socket 9, and outer skull 8 one sides are provided with combi inlet port 13;

Described left pipe box 3 one end case heads are provided with reaction gas inlet 1, gauge port 2, and left pipe box 3 other ends are tightly connected by octangonal ring 4 and housing 14;

In described housing 14, be provided with some tube banks 7, be positioned on the housing wall of restraining 7 inputs and be provided with gas vent 5, be positioned on the housing wall of restraining 7 intermediate ends and be provided with mixed gas outlet 6; Described right pipe box 12 efferent ducts are tightly connected with reaction gas outlet 11 by sealing 10 through end socket 9.

Owing to adopting technical scheme as above, the utlity model has following superiority:

The utility model Intermediate Heat Exchanger, the advantage of comprehensive floating head heat exchanger and fixed tube-sheet exchanger, that is: tube side left end is fixed tube sheet type structure, make simple, easy operating, tube side right-hand member is floating head type structure, free end can be adjusted displacement voluntarily according to temperature difference displacement, between medium, the temperature difference is unrestricted, can under HTHP, work.Free end stretches out housing simultaneously, makes equipment in the situation that not loosing core, still be convenient to clean.

This equipment Intermediate Heat Exchanger compact conformation, manufactures simply, and this equipment tube side right-hand member tube sheet is floating type, and tube side exit adopts packing box seal, good sealing effect; And there is certain elasticity.Under HTHP, heat exchanger tube can produce thermal (temperature difference) stress to be caused and the elongation of heat exchanger tube if equipment can not absorb the heat exchanger tube displacement that this part is caused by thermal (temperature difference) stress, will cause the damage of equipment, and this device structure has solved this problem well.

[brief description of the drawings]

Fig. 1 is the structural representation of the utility model Intermediate Heat Exchanger;

In figure: 1-reaction gas inlet, 2-gauge port, 3-bobbin carriage, 4-octangonal ring, 5-gas vent, 6-mixed gas outlet, 7-tube bank, the outer skull of 8-, 9-end socket, 10-sealing, the outlet of 11-reaction gas, 12-right pipe box, 13-combi inlet port, 14-housing.

[detailed description of the invention]

As shown in Figure 1, a kind of Intermediate Heat Exchanger, comprise: left pipe box 3, housing 14, right pipe box 12, outer skull 8, end socket 9, described left pipe box 3 links into an integrated entity by housing 14 and right pipe box 12, right pipe box 12 is outside equipped with outer skull 8, outer skull 8 one end are provided with end socket 9, and outer skull 8 one sides are provided with combi inlet port 13; Described left pipe box 3 one end case heads are provided with reaction gas inlet 1, gauge port 2, and left pipe box 3 other ends are tightly connected by octangonal ring 4 and housing 14; In described housing 14, be provided with some tube banks 7, be positioned on the housing wall of restraining 7 inputs and be provided with gas vent 5, be positioned on the housing wall of restraining 7 intermediate ends and be provided with mixed gas outlet 6; Described right pipe box 12 efferent ducts are tightly connected with reaction gas outlet 11 by sealing 10 through end socket 9.

This Intermediate Heat Exchanger is mainly used in heat exchange between the medium in chemical system, is applicable to high temperature, high pressure, deep-etching, inflammable and explosive, poisonous and higher to seal request place.

When this Intermediate Heat Exchanger uses, HTHP tube side medium, from equipment left end access arrangement, goes out from right-hand member, and shell side medium enters to bring out from lower end, forms very strong heat exchange at device interior; The right tube side end of equipment is floating end simultaneously, the effectively temperature difference displacement that has solved equipment tube side itself generation under HTHP, and the tube side exit of equipment right-hand member adopts packing seal, has certain bit shift compensation effect, and sealing property is good again simultaneously.The equipment that can ensure can be stable under temperature, high pressure, deep-etching, the very poor working condition such as inflammable and explosive, poisonous running.

Claims

1. an Intermediate Heat Exchanger, it is characterized in that: comprising: left pipe box (3), housing (14), right pipe box (12), outer skull (8), end socket (9), described left pipe box (3) links into an integrated entity by housing (14) and right pipe box (12), right pipe box (12) is outside equipped with outer skull (8), outer skull (8) one end is provided with end socket (9), and outer skull (8) one sides are provided with combi inlet port (13); Described left pipe box (3) one end case head is provided with reaction gas inlet (1), gauge port (2), and left pipe box (3) other end is tightly connected by octangonal ring (4) and housing (14); In described housing (14), be provided with some tube banks (7), be positioned on the housing wall of tube bank (7) input and be provided with gas vent (5), be positioned on the housing wall of tube bank (7) intermediate ends and be provided with mixed gas outlet (6); Described right pipe box (12) efferent duct is tightly connected by sealing (10) and reaction gas outlet (11) through end socket (9).